/*
 * Created on Feb 10, 2005
 * Created by Alon Rohter
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package org.gudy.azureus2.pluginsimpl.local.messaging;

import java.nio.ByteBuffer;

import org.gudy.azureus2.core3.util.DirectByteBuffer;
import org.gudy.azureus2.plugins.messaging.Message;
import org.gudy.azureus2.plugins.messaging.MessageException;

/**
 *
 */
public class MessageAdapter implements Message, com.aelitis.azureus.core.peermanager.messaging.Message {
    private Message plug_msg = null;
    private com.aelitis.azureus.core.peermanager.messaging.Message core_msg = null;

    public MessageAdapter(Message plug_msg) {
        this.plug_msg = plug_msg;
    }

    public MessageAdapter(com.aelitis.azureus.core.peermanager.messaging.Message core_msg) {
        this.core_msg = core_msg;
    }

    public Message getPluginMessage() {
        return plug_msg;
    }

    public com.aelitis.azureus.core.peermanager.messaging.Message getCoreMessage() {
        return core_msg;
    }

    // plugin Message implementation
    public ByteBuffer[] getPayload() {
        if (core_msg == null) {
            return plug_msg.getPayload();
        }

        DirectByteBuffer[] dbbs = core_msg.getData();
        ByteBuffer[] bbs = new ByteBuffer[dbbs.length]; // TODO cache it???
        for (int i = 0; i < dbbs.length; i++) {
            bbs[i] = dbbs[i].getBuffer(DirectByteBuffer.SS_MSG);
        }
        return bbs;
    }

    public Message create(ByteBuffer data) throws MessageException {
        if (core_msg == null) {
            return plug_msg.create(data);
        }

        try {
            return new MessageAdapter(core_msg.deserialize(new DirectByteBuffer(data), (byte) 1));
        } catch (com.aelitis.azureus.core.peermanager.messaging.MessageException e) {
            throw new MessageException(e.getMessage());
        }
    }

    // shared Message implementation
    public String getID() {
        return core_msg == null ? plug_msg.getID() : core_msg.getID();
    }

    public byte[] getIDBytes() {
        return core_msg == null ? plug_msg.getID().getBytes() : core_msg.getIDBytes();
    }

    public int getType() {
        return core_msg == null ? plug_msg.getType() : core_msg.getType();
    }

    public byte getVersion() {
        return core_msg == null ? (byte) 1 : core_msg.getVersion();
    }

    public String getDescription() {
        return core_msg == null ? plug_msg.getDescription() : core_msg.getDescription();
    }

    public void destroy() {
        if (core_msg == null)
            plug_msg.destroy();
        else
            core_msg.destroy();
    }

    // core Message implementation

    public String getFeatureID() {
        return "AZPLUGMSG";
    }

    public int getFeatureSubID() {
        return -1;
    }

    public DirectByteBuffer[] getData() {
        if (plug_msg == null) {
            return core_msg.getData();
        }

        ByteBuffer[] bbs = plug_msg.getPayload();
        DirectByteBuffer[] dbbs = new DirectByteBuffer[bbs.length]; // TODO cache it???
        for (int i = 0; i < bbs.length; i++) {
            dbbs[i] = new DirectByteBuffer(bbs[i]);
        }
        return dbbs;
    }

    public com.aelitis.azureus.core.peermanager.messaging.Message deserialize(DirectByteBuffer data, byte version)
            throws com.aelitis.azureus.core.peermanager.messaging.MessageException {
        if (plug_msg == null) {
            return core_msg.deserialize(data, version);
        }

        try {
            Message message = plug_msg.create(data.getBuffer(DirectByteBuffer.SS_MSG));

            if (message == null) {

                throw (new com.aelitis.azureus.core.peermanager.messaging.MessageException("Plugin message deserialisation failed"));
            }

            return new MessageAdapter(message);
        } catch (MessageException e) {
            throw new com.aelitis.azureus.core.peermanager.messaging.MessageException(e.getMessage());
        } finally {
            data.returnToPool();
        }
    }

}
